Hammer drill



FIG. 1 is a front perspective view of a hammer drill showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is right side elevational view thereof; and,

FIG. 7 is a left side elevational view thereof. 

The ornamental design for a hammer drill, as shown and described. 